* {
  margin: 0;
  padding: 0;
}

@keyframes insetp {
    0% {
      bottom: -10%;
    }
    65% {
      bottom: 90%;
    }
    70% {
      bottom: 80%;
    }
    75% {
      bottom: 88%;
    }
    80% {
      bottom: 80%;
    }
    85% {
      bottom: 85%;
    }
    90% {
      bottom: 80%;
    }
    95% {
      bottom: 82%;
    }
    100% {
      bottom: 80%;
    }
}

body {
  display: flex;
  height: 105vh;
  background-image: linear-gradient(to right, #ff9569 0%, #e92758 100%);
  justify-content: center;
  align-items: center;
  .search-btn {
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    background-color: #fff;
    cursor: pointer;
    .iconfont {
      font-size: 24px;
    }
  }
  .cover {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-color: rgba(0,0,0,0.4);
    transition: dispaly 0.5s;
    .search {
      position: fixed;
      display: flex;
      left: 50%;
      transform: translateX(-50%);
      height: 50px;
      background-color: #fff;
      border-radius: 50px;
      animation:insetp 1.5s ease-out forwards;
      input {
        width: 500px;
        outline: none;
        border: 0;
        border-radius: 50px;
        padding: 0 25px;
        font-size: 20px;
      }
    }
  }
  .cover.active {
    display: block;
  }
}